Nice — here’s a compact, research-ready market reference for the Onboard Carbon Capture System (OCC / OCCS) Market, organized exactly the way you asked. I pulled recent industry sources and pilots so you can use these as citations in a report or slide deck.

Top-cited sources used (most load-bearing statements below rely on these): Wärtsilä product page; DNV industry analysis; Verified Market Research market sizing; Safety4Sea / Global Centre for Maritime Decarbonisation pilot report; Langh Tech news.

This versatile research report is presenting crucial details on market relevant information, harping on ample minute details encompassing a multi-dimensional market that collectively maneuver growth in the global Onboard Carbon Capture System market.

This holistic report presented by the report is also determined to cater to all the market specific information and a take on business analysis and key growth steering best industry practices that optimize million-dollar opportunities amidst staggering competition in Onboard Carbon Capture System market.

Market snapshot — headline numbers

• Multiple market reports project rapid growth for OCC systems: examples include a 2023–2031 CAGR in the high-single to mid-teens (reporting ranges vary by publisher). One widely-cited figure: market ~USD 1.2B (2023/2024) growing to multiple billions by 2030 depending on source and scenario. (Use exact vendor report you prefer for final figure).

Read complete report at: https://www.thebrainyinsights.com/report/onboard-carbon-capture-system-market-13470

Reference of companies (key players) — what they do / why they matter

1. Wärtsilä — developed a full-scale onboard carbon capture system for ships (amine absorption-based flowsheets; pre-conditioning → absorption → desorption → liquefaction → storage). Positioned as an integrated supplier for merchant vessels.

2. Langh Tech — launched an onboard carbon capture system and has announced installations for several bulk carriers (commercial rollout activity).

3. Seabound — deployed a compact OCC unit on a commercial cement carrier (early commercial deployment / demonstration).

4. Shanghai Qiyao / SMDERI-QET (example from pilot reports) — supplier of OCCS used in China pilot projects (shows OEMs/region-centric suppliers are emerging). 

5. Technology & equipment suppliers (examples) — DESMI (pumps & flow systems supporting OCC solvent loops), other marine pump/heat-exchange vendors link into systems. These supply-chain players are essential for integration.

Recent Development

• First full-chain maritime pilot(s) completed (China, mid-2025) demonstrating capture → ship-to-ship transfer → truck offload → downstream processing, validating the end-to-end value chain.

• Several vendors moved from lab/pilot to commercial demos and first installations in 2024–2025 (Wärtsilä full-scale product, Langh Tech rollouts, Seabound commercial unit). These transitions indicate the tech is entering early commercialisation.

Drivers

• Regulatory pressure & IMO activity pushing shipping to decarbonize (workplans and guidelines emerging for OCC).

• Decarbonization deadlines and corporate net-zero targets from charterers and cargo owners who seek emission reductions now.

• Pilot successes that prove chain viability (capture → transfer → storage/use) reduce perceived risk for adoption.

Restraints

• High CAPEX and OPEX (energy penalty, solvent/vessel weight/volume impacts, retrofit complexity).

• Operational complexity and safety/regulatory uncertainty (handling and storage of captured CO₂ onboard; IMO/flag/state rules still evolving).

Regional segmentation analysis

• Asia Pacific: rapid pilot activity and early deployments (China pilots cited), strong growth potential due to large shipping fleets and industrial CO₂ handling infrastructure.

• Europe: vendor R&D and pilot programmes (Wärtsilä, Langh Tech, Seabound activities; regulatory push from EU and North Sea CCS hubs). 

• North America / else: project interest around coastal hubs and potential ship-to-port CO₂ chains; adoption depends on proximity to CO₂ transport & storage facilities. (Regional uptake correlates strongly with CO₂ storage/terminal availability.)

Emerging Trends

• Compact, modular units that minimize footprint & can be retrofitted.

• Integration with value chains (ship-to-ship / ship-to-shore CO₂ transfer demonstrations) — making captured CO₂ useful or available for storage.

• New solvent/sorbent technologies and energy-efficient process variants as vendors seek to reduce energy penalty and volumes. 

Top Use Cases

1. Maritime merchant vessels (bulk carriers, tankers, cement carriers, container ships) — immediate focus.

2. Onshore/offshore industrial vessels (e.g., vessels serving industrial clusters where CO₂ can be offloaded to storage).

3. Aviation & heavy road transport (long-haul trucks) — conceptually possible but much earlier stage; main commercial activity is in shipping today.

Major Challenges

• Scale & weight constraints for ships — storing liquid/gaseous CO₂ and capture equipment consumes valuable space and adds weight.

• Energy penalty (capture requires heat/electric power) — impacts fuel consumption and may reduce net GHG benefit if not powered from low-carbon sources.

• Regulation & liability for handling CO₂ at sea and during transfer — IMO/flag/state protocols still under development.

Attractive Opportunities

• First-mover advantage for shipowners/charterers offering lower-emission shipping to attract premium cargo.

• Integration with port/CO₂ hub development (co-locating OCC adoption with nearby CO₂ export / storage infrastructure reduces logistics cost).

• Service & retrofit market (engineering, solvent supply, CO₂ logistics) — recurring revenue for suppliers and ports.

Key factors of market expansion

• Availability of CO₂ transport & storage hubs (ports, pipeline networks, permanent storage sites).

• Economic incentives / carbon pricing / ETS inclusion that improve project IRR for OCC installations.

• Proven, lower-energy capture technologies and modular designs to simplify retrofits.

• Clear IMO/flag/port regulations and standardized ship-to-shore transfer protocols to reduce legal/operational barriers.